Question

56. Each side of a triangle is increased by 10 cm. If the ratio of the perimeters of the new triangle and the given triangle is 5:4, find the perimeter of the given triangle​

Answer 1

Answer:

120 cm

Step-by-step explanation:

given perimeter = a+b+c

new perimeter= a+10+b+10+c+10

                       = a+b+c+30

                      = given perimeter + 30

ratio between perimeter of new triangle and given triangle= 5:4

= P+30/P= 5/4

= 4(P+30) = 5(P)

= 4P+120=5P

5P-4P=P=120

Hence, the perimeter of the given triangle is 120 cm.

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